Reliable scientific estimates of its total area are hard to come by, but it's often cited to be larger than the "Lost Sea" ...

Tennessee simply delivers on southern charm ... However, listed by the Guinness Book of World Records as the largest ...

Sweetwater, Tenn.? When a 13-year-old boy discovered what is now the world’s second-largest underground lake, he had to crawl through a muddy hole deep inside a cave and throw balls of dirt into ...

Beneath the mossy hills and flat farmlands of Tennessee lies a complex ... Caverns to find the world’s second largest non-subglacial underground lake. With more than 13 acres of water charted ...